Originally Posted by Jimski
1.check the seller's Trader Ratings
2.check the seller's joining date
3.check the seller's legitimity: a 1 year member who never signs up for any game and only has 3 ads selling car equipment is not very legitimate on ASC and should be considered with caution.
4.never offer electronic payement for local pickup unless you know the customer.
Just to add, also look at who the trader ratings are from. If the seller has a couple of positive or negative feedbacks from well respected community members it should tell you something.